Hello, servicing my tubed type axle I noticed rust on the inside of the axle.
A, any suggestion's to get rid if it (I don't have a wire brush long enough)
B, I have removed axle shafts, diff, but the Pinion will not come out, is it removed thru the back of the axel or forward?
C, Any special notes when rebuilding (have replaced thrust washers on sun and planetary gears.)
Many thanks in advance.

The pinion should come out the back if you have a good reason to remove it. Otherwise, leave it alone. If you just want to replace the pinion seal, you can do that without removing the pinion. When you replace the pinion nut after replacing the seal, tighten the nut to the exact position it was in before you removed it. There is a collapsible spacer on the pinion that should be renewed if you've lost the pinion nut position. If you've installed a new collapsible spacer, consult the workshop manual for instructions on setting the nut correctly.

Hello many thanks for your help, yes l have all ready taken the nut off, the reason for removing the pinion is because of cleaning the rust out and spraying with cleaner and water, didn't want the pieces of rust to get lodged in the bearings.
Does the pinion need to be pressed out or can it be hammered out?

Christian,
Removing the crown assembly or the pinion will unnecessarily disturb the lash setup. These diffs are nearly bullet-proof, just clean what you can get to, replace the seals, replace the thrust-washers, reassemble and drive.

Dam wish l spoke to you before, already removed the crown wheel as a component with the sun and planetary gears all bolted together, and listened the pinion but not taken out. Should l just put a new washer spacer and seal and bolt up?